Winch



April 1956 c. J. DRAWDY ET AL 2,742,262

WINCH 2 Sheets-Sheet 2 Filed Dec. 50, 1953 N N T51 INVEN TOR. Q f/IOMASa. spa,

\ weaves E- DEA wa Y BY CUE 7/5 J7 DB4 WDY ATTOE/VE VS 2,742,262 WINCH,J. Drawdy, Jesup, Lawrence E. Drawdy, Brunswick, and Th mas -Sp 'l -nap lic tion nec mbe ao, 1953, Serial No. 461,172

rclaim. (01 254-186) invention relates to a winch and more particularlyto a winch of'the type adapted to be mounted on a service UnitedStatesPatentO "2,742,262 a en d Apr. .17, 195

: era'lly"33i"to the frame 16 for supporting the dif ferentialica'se inposition on the'frame 16. A suitable fblock 34jis carried by the frame16 and extends upwardly "midi s)! ra sing r lowering a load adjacentthe, rear end 1 the eo A primary object of the invention to rotate awind- .l'm sung the lifting of a oad a d to regul te th tliep riod thatthe load is being lowered. v

Another object is to insure thesmooth operation of "the winding drumduring, both the Winding or un inding of a cable relative thereto.

The above and other Objects may be attained by em-.

ploying this imtention which embodies among its features a differentialhaving drive axles mounted to rotate about a dommphraxis, brake drumscarried by the drive axles ifor"rotation therewith, brake shoes carriedby the ditfer- *ieritial adjacent the brake drums for engagement withsaid hralre'drums to arrest rotation thereof, a winding drum mountedadjacent one of the brake drums for rotation about the common axis, acoupling carried by the winding drum and bolted to the adjacent brakedrumfor causing the winding drum to rotate in unison with said brakedrum, and means carried by the differential and opera- ,tively connectedto the brake shoes for selectively'moving said shoes into engagementwith their respective brake 'drums and arresting rotation of one or theother of the drive axles. 7

Other features include hydraulically energized means of the winch; and

Figure 3 is a sectional view taken substantially on the line 3-3 of,Figure 2. V

Referring to the drawings in detail, a service truck designatedgenerally 10 is equipped with a conventional boom 12 which projectsupwardly and rearwardly beyond the rear end of the service truck 10, aswill be readily understood upon reference to Figure 1. v I

My improved winch designated generally 14 comprises a bed frame 16 uponwhich, is supported longitudinally spaced parallel cross beams 18 andend members 20 and 22. Carried by and extending between the end member22 and the next adjacent cross beam 18 is a supporting channel 24 havinglongitudinally spaced openings 26 extending therethrough and carryinglongitudinally spaced eyes 28, the purpose of which will hereinafterappear.

Carried by the end bar 20 and the next adjacent cross beam 18 are straps30 which serve to clamp the axle hous ing extensions 32 of adifferential case designated gen- ,isneeri er retrograde motion ofthewinding drum during 1 carried by the differential and operativelyconnected to j therefrom between thecross member 18 and the end barZOandLcarried by the block 34 is a strap 36 which engages the p ropellershaft housing 38, of the differential 33. A propeller shaft .40 ismounted in the housing '38 for rota- .tion aboutits longitudinal axisand .is connected within the 'interionof the differential housing 38through a conven- 'tional train of gears 42 10 axleshafts 44 and .46which extend t rough th extensions 32 and carry adjacent their endsremote from thefgear train 42 brake drums 48 and 50, respectively. I f,t p v (Mounted for rotation in bearings 52 about an axis which alignswiththeaxis er the axle shafts 44 and 46 is a shaft S4Vcarryingintermediate its ends a spool or winding drum 56 upon which a cable 58is wound according to the 1 direction of rotation of the shaft 54.Integral with the shaft 54 adjacent the drum 50 is a flanged, cup shapedcouplin'g 60, the outwardly directed flange 62 is provided with'circumferentialiy spaced o eni'ngs which are adapted to register withcircumferentially spaced internally screw threaded recesses formed inthe drum50 for the recep- "titan of screws 64; which'passthrough theopenings inthe flange 2-.andeuter the threaded openings in the drum 50to cau e-the spool or inding drum 56 to rotate in unison wi hthe um 9:Th cupling opens toward drum .5-

and encloses the outer end of the axle shaft 46, with shaft 54 connectedo closedendof the cou ling in coaxial alignment with axle shaft Qarriedby the differential" h using 33 a ja ent theends of the tubular arms 32are closure discs 66 whichserve'as dust caps to exclude dust d i fro ter r jofthe'drunis 48 and50, a d

carried by the disc 66' whichclosesthe drum/18 is a conventional brakeshoe 68, the expansion of which is gov erned by a conventional hydrauliccylinder 70. The differential housing, arms 32, and discs 66 comprise,with the elements 16, 18, 20, 22, and 24, a stationary supportstructure. A similar brake shoe 72 is carried by the disc 66 whichcloses the open side of the drum 50 and the expansion of the shoe 72into contact with the drum 50 is controlled by a conventional hydrauliccylinder 74. Mount 78, the brake shoe 72 may be expandedinto engagementwith the drum 50 to arrest rotation of the spool or winding drum 56,whereas upon the manipulation of the plunger of the master cylinder 76,the, brake shoe 68 within the drum 48 will be expanded into contact withthe drum to arrest rotation of the axle shaft 44 and causeanytrotarymotion imparted to the propeller shaft to be transmitted tothe axle shaft 46 and hence through the drum 50 and coupling 60 to thespool or winding drum 56. Carried by and extending between the end bar22 and adjacent cross bar 18 in spaced parallel relation with thesupporting member 24 is a' shaft 84 upon which levers 86 and'88 aremounted to rock. These levers are coupled to the plungers of thecylinders 76 andj78 so that the hydraulic cylinders 70 and 74 may bemanipulated I from a person stationed adjacent the hand levers 86 and88.

Carried by the frame 16 at any convenient location is .the spool orwinding drum 56, the hand lever 88 is moved to expel hydraulic fluidfrom the cylinder 76 t o the conduit 80 and .into'the cylinder 70 toexpand the brake shoes '68 into engagement withthe drum 48. It will thusbe seen that the brake shoe 68 will move into engagement with the brakedrum 48 to arrest rotation of the shaft section 44 and cause the powertransmitted to'the gearing 42 through the propeller shaft 40 to be takenup by the shaft section 46 and through the drum 50 to be transmittedthrough the medium of the coupling 60 to the winding drum or spool 56.'.This will cause thecable 58 to be Wound upon the winding drum and causeany weight carried-by the end of the cable remote from the winding drumto be elevated toward the boom 12. Whenit is desired to lower the load,the hand lever 86 is moved to expel fluid from the cylinder 78 throughthe conduit 80 to the cylinder 74 to cause the brake shoes 72 to expand.into contact With the drum 50 and simultaneously the hand lever 88 ismoved to withdraw fluid from the cylinder 70 and permit the shoe 68 todisengage the drum 48.

With the shoe 72 frictionally engaging the drum 50, the speed of descentof the loadon the cable 58 may be gove'rned, or the descent of the loadcan be completely arrested according to the pressure of the fluid withinthe cylinder '73. g i p W While in the foregoing there has been shownand described the' preferred embodiment of this invention, it is to beunderstood that minor changes in the details of construction,combination and arrangement of parts may be resorted to withoutdeparting from the spirit and scope of the invention as claimed.

' drum independently of the other shoe.

What is claimed is:

A winch comprising a supporting structure; a pair of axle shafts havinginner ends in spaced relation, said axle shafts being rotatably mountedon said structure; brake drums connected to the outer ends of therespective axle shafts for rotation therewith; brake shoes carried bysaid structure for arresting rotation of the respective drums andshafts; a spool rotatably mounted on said structure; a cable wound uponthe spool; means connecting the spool and one drum for joint rotation,both drums being mounted on said structure in positions elevated aboveand wholly out of contact with a supporting surface over which thestructure is disposed, for rotation of the drums free of restraint bysaid surface, the spool including a shaft coaxial with the axle shaftsand lying wholly beyond the outer end of the axle shaft connected tosaid one drum, said means comprising a cup shaped coupling formed openat one end, said one end of the coupling opening toward said one drumand being formed with an outwardly directed peripheral flange secured tosaid one drum, the coupling enclosing the outer end of the axle shaftconnected to said one drum, and the spool shaft being rigidly connectedto the coupling at the closed end thereof; a differential drivinglyconnected to the respective axles; means connected to the differentialfor driving the same; and means mounted on said structure and connectedto the respective shoes for shifting each shoe into engagement with itsassociated References Cited in the file of this patent UNITED STATESPATENTS 2,240,570 Oesterheld May 6, 1941 7 2,606,745 Ballet a1 Aug. 12,1952 2,643,092 Paulette June 23, 1953 2,662,731 Smith Dec. 15, 1953FOREIGN PATENTS 285,658 Great'Britain Feb. 23, 1928

